Paint.cpp revision 1149cdc84b77d0cbe3c44a7ec6abd29fc63913b5
1/* libs/android_runtime/android/graphics/Paint.cpp 2** 3** Copyright 2006, The Android Open Source Project 4** 5** Licensed under the Apache License, Version 2.0 (the "License"); 6** you may not use this file except in compliance with the License. 7** You may obtain a copy of the License at 8** 9** http://www.apache.org/licenses/LICENSE-2.0 10** 11** Unless required by applicable law or agreed to in writing, software 12** distributed under the License is distributed on an "AS IS" BASIS, 13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14** See the License for the specific language governing permissions and 15** limitations under the License. 16*/ 17 18#define LOG_TAG "Paint" 19 20#include <utils/Log.h> 21 22#include "jni.h" 23#include "GraphicsJNI.h" 24#include "core_jni_helpers.h" 25#include <ScopedStringChars.h> 26#include <ScopedUtfChars.h> 27 28#include "SkBlurDrawLooper.h" 29#include "SkColorFilter.h" 30#include "SkMaskFilter.h" 31#include "SkRasterizer.h" 32#include "SkShader.h" 33#include "SkTypeface.h" 34#include "SkXfermode.h" 35#include "unicode/uloc.h" 36#include "unicode/ushape.h" 37#include "utils/Blur.h" 38 39#include <minikin/GraphemeBreak.h> 40#include <minikin/Measurement.h> 41#include "MinikinSkia.h" 42#include "MinikinUtils.h" 43#include "Paint.h" 44#include "TypefaceImpl.h" 45 46#include <vector> 47 48// temporary for debugging 49#include <Caches.h> 50#include <utils/Log.h> 51 52namespace android { 53 54struct JMetricsID { 55 jfieldID top; 56 jfieldID ascent; 57 jfieldID descent; 58 jfieldID bottom; 59 jfieldID leading; 60}; 61 62static jclass gFontMetrics_class; 63static JMetricsID gFontMetrics_fieldID; 64 65static jclass gFontMetricsInt_class; 66static JMetricsID gFontMetricsInt_fieldID; 67 68static jclass gPaint_class; 69static jfieldID gPaint_nativeInstanceID; 70static jfieldID gPaint_nativeTypefaceID; 71 72static void defaultSettingsForAndroid(Paint* paint) { 73 // GlyphID encoding is required because we are using Harfbuzz shaping 74 paint->setTextEncoding(Paint::kGlyphID_TextEncoding); 75} 76 77class PaintGlue { 78public: 79 enum MoveOpt { 80 AFTER, AT_OR_AFTER, BEFORE, AT_OR_BEFORE, AT 81 }; 82 83 static Paint* getNativePaint(JNIEnv* env, jobject paint) { 84 SkASSERT(env); 85 SkASSERT(paint); 86 SkASSERT(env->IsInstanceOf(paint, gPaint_class)); 87 jlong paintHandle = env->GetLongField(paint, gPaint_nativeInstanceID); 88 android::Paint* p = reinterpret_cast<android::Paint*>(paintHandle); 89 SkASSERT(p); 90 return p; 91 } 92 93 static TypefaceImpl* getNativeTypeface(JNIEnv* env, jobject paint) { 94 SkASSERT(env); 95 SkASSERT(paint); 96 SkASSERT(env->IsInstanceOf(paint, gPaint_class)); 97 jlong typefaceHandle = env->GetLongField(paint, gPaint_nativeTypefaceID); 98 android::TypefaceImpl* p = reinterpret_cast<android::TypefaceImpl*>(typefaceHandle); 99 return p; 100 } 101 102 static void finalizer(JNIEnv* env, jobject clazz, jlong objHandle) { 103 Paint* obj = reinterpret_cast<Paint*>(objHandle); 104 delete obj; 105 } 106 107 static jlong init(JNIEnv* env, jobject clazz) { 108 SK_COMPILE_ASSERT(1 << 0 == SkPaint::kAntiAlias_Flag, paint_flags_mismatch); 109 SK_COMPILE_ASSERT(1 << 2 == SkPaint::kDither_Flag, paint_flags_mismatch); 110 SK_COMPILE_ASSERT(1 << 3 == SkPaint::kUnderlineText_Flag, paint_flags_mismatch); 111 SK_COMPILE_ASSERT(1 << 4 == SkPaint::kStrikeThruText_Flag, paint_flags_mismatch); 112 SK_COMPILE_ASSERT(1 << 5 == SkPaint::kFakeBoldText_Flag, paint_flags_mismatch); 113 SK_COMPILE_ASSERT(1 << 6 == SkPaint::kLinearText_Flag, paint_flags_mismatch); 114 SK_COMPILE_ASSERT(1 << 7 == SkPaint::kSubpixelText_Flag, paint_flags_mismatch); 115 SK_COMPILE_ASSERT(1 << 8 == SkPaint::kDevKernText_Flag, paint_flags_mismatch); 116 SK_COMPILE_ASSERT(1 << 10 == SkPaint::kEmbeddedBitmapText_Flag, paint_flags_mismatch); 117 118 Paint* obj = new Paint(); 119 defaultSettingsForAndroid(obj); 120 return reinterpret_cast<jlong>(obj); 121 } 122 123 static jlong initWithPaint(JNIEnv* env, jobject clazz, jlong paintHandle) { 124 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 125 Paint* obj = new Paint(*paint); 126 return reinterpret_cast<jlong>(obj); 127 } 128 129 static void reset(JNIEnv* env, jobject clazz, jlong objHandle) { 130 Paint* obj = reinterpret_cast<Paint*>(objHandle); 131 obj->reset(); 132 defaultSettingsForAndroid(obj); 133 } 134 135 static void assign(JNIEnv* env, jobject clazz, jlong dstPaintHandle, jlong srcPaintHandle) { 136 Paint* dst = reinterpret_cast<Paint*>(dstPaintHandle); 137 const Paint* src = reinterpret_cast<Paint*>(srcPaintHandle); 138 *dst = *src; 139 } 140 141 // Equivalent to the Java Paint's FILTER_BITMAP_FLAG. 142 static const uint32_t sFilterBitmapFlag = 0x02; 143 144 static jint getFlags(JNIEnv* env, jobject paint) { 145 NPE_CHECK_RETURN_ZERO(env, paint); 146 Paint* nativePaint = getNativePaint(env, paint); 147 uint32_t result = nativePaint->getFlags(); 148 result &= ~sFilterBitmapFlag; // Filtering no longer stored in this bit. Mask away. 149 if (nativePaint->getFilterQuality() != kNone_SkFilterQuality) { 150 result |= sFilterBitmapFlag; 151 } 152 return static_cast<jint>(result); 153 } 154 155 static void setFlags(JNIEnv* env, jobject paint, jint flags) { 156 NPE_CHECK_RETURN_VOID(env, paint); 157 Paint* nativePaint = getNativePaint(env, paint); 158 // Instead of modifying 0x02, change the filter level. 159 nativePaint->setFilterQuality(flags & sFilterBitmapFlag 160 ? kLow_SkFilterQuality 161 : kNone_SkFilterQuality); 162 // Don't pass through filter flag, which is no longer stored in paint's flags. 163 flags &= ~sFilterBitmapFlag; 164 // Use the existing value for 0x02. 165 const uint32_t existing0x02Flag = nativePaint->getFlags() & sFilterBitmapFlag; 166 flags |= existing0x02Flag; 167 nativePaint->setFlags(flags); 168 } 169 170 static jint getHinting(JNIEnv* env, jobject paint) { 171 NPE_CHECK_RETURN_ZERO(env, paint); 172 return getNativePaint(env, paint)->getHinting() 173 == Paint::kNo_Hinting ? 0 : 1; 174 } 175 176 static void setHinting(JNIEnv* env, jobject paint, jint mode) { 177 NPE_CHECK_RETURN_VOID(env, paint); 178 getNativePaint(env, paint)->setHinting( 179 mode == 0 ? Paint::kNo_Hinting : Paint::kNormal_Hinting); 180 } 181 182 static void setAntiAlias(JNIEnv* env, jobject paint, jboolean aa) { 183 NPE_CHECK_RETURN_VOID(env, paint); 184 getNativePaint(env, paint)->setAntiAlias(aa); 185 } 186 187 static void setLinearText(JNIEnv* env, jobject paint, jboolean linearText) { 188 NPE_CHECK_RETURN_VOID(env, paint); 189 getNativePaint(env, paint)->setLinearText(linearText); 190 } 191 192 static void setSubpixelText(JNIEnv* env, jobject paint, jboolean subpixelText) { 193 NPE_CHECK_RETURN_VOID(env, paint); 194 getNativePaint(env, paint)->setSubpixelText(subpixelText); 195 } 196 197 static void setUnderlineText(JNIEnv* env, jobject paint, jboolean underlineText) { 198 NPE_CHECK_RETURN_VOID(env, paint); 199 getNativePaint(env, paint)->setUnderlineText(underlineText); 200 } 201 202 static void setStrikeThruText(JNIEnv* env, jobject paint, jboolean strikeThruText) { 203 NPE_CHECK_RETURN_VOID(env, paint); 204 getNativePaint(env, paint)->setStrikeThruText(strikeThruText); 205 } 206 207 static void setFakeBoldText(JNIEnv* env, jobject paint, jboolean fakeBoldText) { 208 NPE_CHECK_RETURN_VOID(env, paint); 209 getNativePaint(env, paint)->setFakeBoldText(fakeBoldText); 210 } 211 212 static void setFilterBitmap(JNIEnv* env, jobject paint, jboolean filterBitmap) { 213 NPE_CHECK_RETURN_VOID(env, paint); 214 getNativePaint(env, paint)->setFilterQuality( 215 filterBitmap ? kLow_SkFilterQuality : kNone_SkFilterQuality); 216 } 217 218 static void setDither(JNIEnv* env, jobject paint, jboolean dither) { 219 NPE_CHECK_RETURN_VOID(env, paint); 220 getNativePaint(env, paint)->setDither(dither); 221 } 222 223 static jint getStyle(JNIEnv* env, jobject clazz,jlong objHandle) { 224 Paint* obj = reinterpret_cast<Paint*>(objHandle); 225 return static_cast<jint>(obj->getStyle()); 226 } 227 228 static void setStyle(JNIEnv* env, jobject clazz, jlong objHandle, jint styleHandle) { 229 Paint* obj = reinterpret_cast<Paint*>(objHandle); 230 Paint::Style style = static_cast<Paint::Style>(styleHandle); 231 obj->setStyle(style); 232 } 233 234 static jint getColor(JNIEnv* env, jobject paint) { 235 NPE_CHECK_RETURN_ZERO(env, paint); 236 int color; 237 color = getNativePaint(env, paint)->getColor(); 238 return static_cast<jint>(color); 239 } 240 241 static jint getAlpha(JNIEnv* env, jobject paint) { 242 NPE_CHECK_RETURN_ZERO(env, paint); 243 int alpha; 244 alpha = getNativePaint(env, paint)->getAlpha(); 245 return static_cast<jint>(alpha); 246 } 247 248 static void setColor(JNIEnv* env, jobject paint, jint color) { 249 NPE_CHECK_RETURN_VOID(env, paint); 250 getNativePaint(env, paint)->setColor(color); 251 } 252 253 static void setAlpha(JNIEnv* env, jobject paint, jint a) { 254 NPE_CHECK_RETURN_VOID(env, paint); 255 getNativePaint(env, paint)->setAlpha(a); 256 } 257 258 static jfloat getStrokeWidth(JNIEnv* env, jobject paint) { 259 NPE_CHECK_RETURN_ZERO(env, paint); 260 return SkScalarToFloat(getNativePaint(env, paint)->getStrokeWidth()); 261 } 262 263 static void setStrokeWidth(JNIEnv* env, jobject paint, jfloat width) { 264 NPE_CHECK_RETURN_VOID(env, paint); 265 getNativePaint(env, paint)->setStrokeWidth(width); 266 } 267 268 static jfloat getStrokeMiter(JNIEnv* env, jobject paint) { 269 NPE_CHECK_RETURN_ZERO(env, paint); 270 return SkScalarToFloat(getNativePaint(env, paint)->getStrokeMiter()); 271 } 272 273 static void setStrokeMiter(JNIEnv* env, jobject paint, jfloat miter) { 274 NPE_CHECK_RETURN_VOID(env, paint); 275 getNativePaint(env, paint)->setStrokeMiter(miter); 276 } 277 278 static jint getStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle) { 279 Paint* obj = reinterpret_cast<Paint*>(objHandle); 280 return static_cast<jint>(obj->getStrokeCap()); 281 } 282 283 static void setStrokeCap(JNIEnv* env, jobject clazz, jlong objHandle, jint capHandle) { 284 Paint* obj = reinterpret_cast<Paint*>(objHandle); 285 Paint::Cap cap = static_cast<Paint::Cap>(capHandle); 286 obj->setStrokeCap(cap); 287 } 288 289 static jint getStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle) { 290 Paint* obj = reinterpret_cast<Paint*>(objHandle); 291 return static_cast<jint>(obj->getStrokeJoin()); 292 } 293 294 static void setStrokeJoin(JNIEnv* env, jobject clazz, jlong objHandle, jint joinHandle) { 295 Paint* obj = reinterpret_cast<Paint*>(objHandle); 296 Paint::Join join = (Paint::Join) joinHandle; 297 obj->setStrokeJoin(join); 298 } 299 300 static jboolean getFillPath(JNIEnv* env, jobject clazz, jlong objHandle, jlong srcHandle, jlong dstHandle) { 301 Paint* obj = reinterpret_cast<Paint*>(objHandle); 302 SkPath* src = reinterpret_cast<SkPath*>(srcHandle); 303 SkPath* dst = reinterpret_cast<SkPath*>(dstHandle); 304 return obj->getFillPath(*src, dst) ? JNI_TRUE : JNI_FALSE; 305 } 306 307 static jlong setShader(JNIEnv* env, jobject clazz, jlong objHandle, jlong shaderHandle) { 308 Paint* obj = reinterpret_cast<Paint*>(objHandle); 309 SkShader* shader = reinterpret_cast<SkShader*>(shaderHandle); 310 return reinterpret_cast<jlong>(obj->setShader(shader)); 311 } 312 313 static jlong setColorFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong filterHandle) { 314 Paint* obj = reinterpret_cast<Paint *>(objHandle); 315 SkColorFilter* filter = reinterpret_cast<SkColorFilter *>(filterHandle); 316 return reinterpret_cast<jlong>(obj->setColorFilter(filter)); 317 } 318 319 static jlong setXfermode(JNIEnv* env, jobject clazz, jlong objHandle, jlong xfermodeHandle) { 320 Paint* obj = reinterpret_cast<Paint*>(objHandle); 321 SkXfermode* xfermode = reinterpret_cast<SkXfermode*>(xfermodeHandle); 322 return reinterpret_cast<jlong>(obj->setXfermode(xfermode)); 323 } 324 325 static jlong setPathEffect(JNIEnv* env, jobject clazz, jlong objHandle, jlong effectHandle) { 326 Paint* obj = reinterpret_cast<Paint*>(objHandle); 327 SkPathEffect* effect = reinterpret_cast<SkPathEffect*>(effectHandle); 328 return reinterpret_cast<jlong>(obj->setPathEffect(effect)); 329 } 330 331 static jlong setMaskFilter(JNIEnv* env, jobject clazz, jlong objHandle, jlong maskfilterHandle) { 332 Paint* obj = reinterpret_cast<Paint*>(objHandle); 333 SkMaskFilter* maskfilter = reinterpret_cast<SkMaskFilter*>(maskfilterHandle); 334 return reinterpret_cast<jlong>(obj->setMaskFilter(maskfilter)); 335 } 336 337 static jlong setTypeface(JNIEnv* env, jobject clazz, jlong objHandle, jlong typefaceHandle) { 338 // TODO: in Paint refactoring, set typeface on android Paint, not Paint 339 return NULL; 340 } 341 342 static jlong setRasterizer(JNIEnv* env, jobject clazz, jlong objHandle, jlong rasterizerHandle) { 343 Paint* obj = reinterpret_cast<Paint*>(objHandle); 344 SkAutoTUnref<SkRasterizer> rasterizer(GraphicsJNI::refNativeRasterizer(rasterizerHandle)); 345 return reinterpret_cast<jlong>(obj->setRasterizer(rasterizer)); 346 } 347 348 static jint getTextAlign(JNIEnv* env, jobject clazz, jlong objHandle) { 349 Paint* obj = reinterpret_cast<Paint*>(objHandle); 350 return static_cast<jint>(obj->getTextAlign()); 351 } 352 353 static void setTextAlign(JNIEnv* env, jobject clazz, jlong objHandle, jint alignHandle) { 354 Paint* obj = reinterpret_cast<Paint*>(objHandle); 355 Paint::Align align = static_cast<Paint::Align>(alignHandle); 356 obj->setTextAlign(align); 357 } 358 359 // generate bcp47 identifier for the supplied locale 360 static void toLanguageTag(char* output, size_t outSize, 361 const char* locale) { 362 if (output == NULL || outSize <= 0) { 363 return; 364 } 365 if (locale == NULL) { 366 output[0] = '\0'; 367 return; 368 } 369 char canonicalChars[ULOC_FULLNAME_CAPACITY]; 370 UErrorCode uErr = U_ZERO_ERROR; 371 uloc_canonicalize(locale, canonicalChars, ULOC_FULLNAME_CAPACITY, 372 &uErr); 373 if (U_SUCCESS(uErr)) { 374 char likelyChars[ULOC_FULLNAME_CAPACITY]; 375 uErr = U_ZERO_ERROR; 376 uloc_addLikelySubtags(canonicalChars, likelyChars, 377 ULOC_FULLNAME_CAPACITY, &uErr); 378 if (U_SUCCESS(uErr)) { 379 uErr = U_ZERO_ERROR; 380 uloc_toLanguageTag(likelyChars, output, outSize, FALSE, &uErr); 381 if (U_SUCCESS(uErr)) { 382 return; 383 } else { 384 ALOGD("uloc_toLanguageTag(\"%s\") failed: %s", likelyChars, 385 u_errorName(uErr)); 386 } 387 } else { 388 ALOGD("uloc_addLikelySubtags(\"%s\") failed: %s", 389 canonicalChars, u_errorName(uErr)); 390 } 391 } else { 392 ALOGD("uloc_canonicalize(\"%s\") failed: %s", locale, 393 u_errorName(uErr)); 394 } 395 // unable to build a proper language identifier 396 output[0] = '\0'; 397 } 398 399 static void setTextLocale(JNIEnv* env, jobject clazz, jlong objHandle, jstring locale) { 400 Paint* obj = reinterpret_cast<Paint*>(objHandle); 401 ScopedUtfChars localeChars(env, locale); 402 char langTag[ULOC_FULLNAME_CAPACITY]; 403 toLanguageTag(langTag, ULOC_FULLNAME_CAPACITY, localeChars.c_str()); 404 405 obj->setTextLocale(langTag); 406 } 407 408 static jboolean isElegantTextHeight(JNIEnv* env, jobject paint) { 409 NPE_CHECK_RETURN_ZERO(env, paint); 410 Paint* obj = getNativePaint(env, paint); 411 return obj->getFontVariant() == VARIANT_ELEGANT; 412 } 413 414 static void setElegantTextHeight(JNIEnv* env, jobject paint, jboolean aa) { 415 NPE_CHECK_RETURN_VOID(env, paint); 416 Paint* obj = getNativePaint(env, paint); 417 obj->setFontVariant(aa ? VARIANT_ELEGANT : VARIANT_DEFAULT); 418 } 419 420 static jfloat getTextSize(JNIEnv* env, jobject paint) { 421 NPE_CHECK_RETURN_ZERO(env, paint); 422 return SkScalarToFloat(getNativePaint(env, paint)->getTextSize()); 423 } 424 425 static void setTextSize(JNIEnv* env, jobject paint, jfloat textSize) { 426 NPE_CHECK_RETURN_VOID(env, paint); 427 getNativePaint(env, paint)->setTextSize(textSize); 428 } 429 430 static jfloat getTextScaleX(JNIEnv* env, jobject paint) { 431 NPE_CHECK_RETURN_ZERO(env, paint); 432 return SkScalarToFloat(getNativePaint(env, paint)->getTextScaleX()); 433 } 434 435 static void setTextScaleX(JNIEnv* env, jobject paint, jfloat scaleX) { 436 NPE_CHECK_RETURN_VOID(env, paint); 437 getNativePaint(env, paint)->setTextScaleX(scaleX); 438 } 439 440 static jfloat getTextSkewX(JNIEnv* env, jobject paint) { 441 NPE_CHECK_RETURN_ZERO(env, paint); 442 return SkScalarToFloat(getNativePaint(env, paint)->getTextSkewX()); 443 } 444 445 static void setTextSkewX(JNIEnv* env, jobject paint, jfloat skewX) { 446 NPE_CHECK_RETURN_VOID(env, paint); 447 getNativePaint(env, paint)->setTextSkewX(skewX); 448 } 449 450 static jfloat getLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle) { 451 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 452 return paint->getLetterSpacing(); 453 } 454 455 static void setLetterSpacing(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat letterSpacing) { 456 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 457 paint->setLetterSpacing(letterSpacing); 458 } 459 460 static void setFontFeatureSettings(JNIEnv* env, jobject clazz, jlong paintHandle, jstring settings) { 461 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 462 if (!settings) { 463 paint->setFontFeatureSettings(std::string()); 464 } else { 465 ScopedUtfChars settingsChars(env, settings); 466 paint->setFontFeatureSettings(std::string(settingsChars.c_str(), settingsChars.size())); 467 } 468 } 469 470 static jint getHyphenEdit(JNIEnv* env, jobject clazz, jlong paintHandle, jint hyphen) { 471 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 472 return paint->getHyphenEdit(); 473 } 474 475 static void setHyphenEdit(JNIEnv* env, jobject clazz, jlong paintHandle, jint hyphen) { 476 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 477 paint->setHyphenEdit((uint32_t)hyphen); 478 } 479 480 static SkScalar getMetricsInternal(JNIEnv* env, jobject jpaint, Paint::FontMetrics *metrics) { 481 const int kElegantTop = 2500; 482 const int kElegantBottom = -1000; 483 const int kElegantAscent = 1900; 484 const int kElegantDescent = -500; 485 const int kElegantLeading = 0; 486 Paint* paint = getNativePaint(env, jpaint); 487 TypefaceImpl* typeface = getNativeTypeface(env, jpaint); 488 typeface = TypefaceImpl_resolveDefault(typeface); 489 FakedFont baseFont = typeface->fFontCollection->baseFontFaked(typeface->fStyle); 490 float saveSkewX = paint->getTextSkewX(); 491 bool savefakeBold = paint->isFakeBoldText(); 492 MinikinFontSkia::populateSkPaint(paint, baseFont.font, baseFont.fakery); 493 SkScalar spacing = paint->getFontMetrics(metrics); 494 // The populateSkPaint call may have changed fake bold / text skew 495 // because we want to measure with those effects applied, so now 496 // restore the original settings. 497 paint->setTextSkewX(saveSkewX); 498 paint->setFakeBoldText(savefakeBold); 499 if (paint->getFontVariant() == VARIANT_ELEGANT) { 500 SkScalar size = paint->getTextSize(); 501 metrics->fTop = -size * kElegantTop / 2048; 502 metrics->fBottom = -size * kElegantBottom / 2048; 503 metrics->fAscent = -size * kElegantAscent / 2048; 504 metrics->fDescent = -size * kElegantDescent / 2048; 505 metrics->fLeading = size * kElegantLeading / 2048; 506 spacing = metrics->fDescent - metrics->fAscent + metrics->fLeading; 507 } 508 return spacing; 509 } 510 511 static jfloat ascent(JNIEnv* env, jobject paint) { 512 NPE_CHECK_RETURN_ZERO(env, paint); 513 Paint::FontMetrics metrics; 514 getMetricsInternal(env, paint, &metrics); 515 return SkScalarToFloat(metrics.fAscent); 516 } 517 518 static jfloat descent(JNIEnv* env, jobject paint) { 519 NPE_CHECK_RETURN_ZERO(env, paint); 520 Paint::FontMetrics metrics; 521 getMetricsInternal(env, paint, &metrics); 522 return SkScalarToFloat(metrics.fDescent); 523 } 524 525 static jfloat getFontMetrics(JNIEnv* env, jobject paint, jobject metricsObj) { 526 NPE_CHECK_RETURN_ZERO(env, paint); 527 Paint::FontMetrics metrics; 528 SkScalar spacing = getMetricsInternal(env, paint, &metrics); 529 530 if (metricsObj) { 531 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetrics_class)); 532 env->SetFloatField(metricsObj, gFontMetrics_fieldID.top, SkScalarToFloat(metrics.fTop)); 533 env->SetFloatField(metricsObj, gFontMetrics_fieldID.ascent, SkScalarToFloat(metrics.fAscent)); 534 env->SetFloatField(metricsObj, gFontMetrics_fieldID.descent, SkScalarToFloat(metrics.fDescent)); 535 env->SetFloatField(metricsObj, gFontMetrics_fieldID.bottom, SkScalarToFloat(metrics.fBottom)); 536 env->SetFloatField(metricsObj, gFontMetrics_fieldID.leading, SkScalarToFloat(metrics.fLeading)); 537 } 538 return SkScalarToFloat(spacing); 539 } 540 541 static jint getFontMetricsInt(JNIEnv* env, jobject paint, jobject metricsObj) { 542 NPE_CHECK_RETURN_ZERO(env, paint); 543 Paint::FontMetrics metrics; 544 545 getMetricsInternal(env, paint, &metrics); 546 int ascent = SkScalarRoundToInt(metrics.fAscent); 547 int descent = SkScalarRoundToInt(metrics.fDescent); 548 int leading = SkScalarRoundToInt(metrics.fLeading); 549 550 if (metricsObj) { 551 SkASSERT(env->IsInstanceOf(metricsObj, gFontMetricsInt_class)); 552 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.top, SkScalarFloorToInt(metrics.fTop)); 553 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.ascent, ascent); 554 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.descent, descent); 555 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.bottom, SkScalarCeilToInt(metrics.fBottom)); 556 env->SetIntField(metricsObj, gFontMetricsInt_fieldID.leading, leading); 557 } 558 return descent - ascent + leading; 559 } 560 561 static jfloat measureText_CIII(JNIEnv* env, jobject jpaint, jcharArray text, jint index, jint count, 562 jint bidiFlags) { 563 NPE_CHECK_RETURN_ZERO(env, jpaint); 564 NPE_CHECK_RETURN_ZERO(env, text); 565 566 size_t textLength = env->GetArrayLength(text); 567 if ((index | count) < 0 || (size_t)(index + count) > textLength) { 568 doThrowAIOOBE(env); 569 return 0; 570 } 571 if (count == 0) { 572 return 0; 573 } 574 575 Paint* paint = getNativePaint(env, jpaint); 576 const jchar* textArray = env->GetCharArrayElements(text, NULL); 577 jfloat result = 0; 578 579 Layout layout; 580 TypefaceImpl* typeface = getNativeTypeface(env, jpaint); 581 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray + index, 0, count, 582 count); 583 result = layout.getAdvance(); 584 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 585 return result; 586 } 587 588 static jfloat measureText_StringIII(JNIEnv* env, jobject jpaint, jstring text, jint start, jint end, 589 jint bidiFlags) { 590 NPE_CHECK_RETURN_ZERO(env, jpaint); 591 NPE_CHECK_RETURN_ZERO(env, text); 592 593 size_t textLength = env->GetStringLength(text); 594 int count = end - start; 595 if ((start | count) < 0 || (size_t)end > textLength) { 596 doThrowAIOOBE(env); 597 return 0; 598 } 599 if (count == 0) { 600 return 0; 601 } 602 603 const jchar* textArray = env->GetStringChars(text, NULL); 604 Paint* paint = getNativePaint(env, jpaint); 605 jfloat width = 0; 606 607 Layout layout; 608 TypefaceImpl* typeface = getNativeTypeface(env, jpaint); 609 // Only the substring is used for measurement, so no additional context is passed in. This 610 // behavior is consistent between char[] and String specializations. 611 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray + start, 0, count, count); 612 width = layout.getAdvance(); 613 614 env->ReleaseStringChars(text, textArray); 615 return width; 616 } 617 618 static jfloat measureText_StringI(JNIEnv* env, jobject jpaint, jstring text, jint bidiFlags) { 619 NPE_CHECK_RETURN_ZERO(env, jpaint); 620 NPE_CHECK_RETURN_ZERO(env, text); 621 622 size_t textLength = env->GetStringLength(text); 623 if (textLength == 0) { 624 return 0; 625 } 626 627 const jchar* textArray = env->GetStringChars(text, NULL); 628 Paint* paint = getNativePaint(env, jpaint); 629 jfloat width = 0; 630 631 Layout layout; 632 TypefaceImpl* typeface = getNativeTypeface(env, jpaint); 633 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, textArray, 0, textLength, textLength); 634 width = layout.getAdvance(); 635 636 env->ReleaseStringChars(text, textArray); 637 return width; 638 } 639 640 static int dotextwidths(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar text[], int count, 641 jfloatArray widths, jint bidiFlags) { 642 NPE_CHECK_RETURN_ZERO(env, paint); 643 NPE_CHECK_RETURN_ZERO(env, text); 644 645 if (count < 0 || !widths) { 646 doThrowAIOOBE(env); 647 return 0; 648 } 649 if (count == 0) { 650 return 0; 651 } 652 size_t widthsLength = env->GetArrayLength(widths); 653 if ((size_t)count > widthsLength) { 654 doThrowAIOOBE(env); 655 return 0; 656 } 657 658 AutoJavaFloatArray autoWidths(env, widths, count); 659 jfloat* widthsArray = autoWidths.ptr(); 660 661 Layout layout; 662 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count); 663 layout.getAdvances(widthsArray); 664 665 return count; 666 } 667 668 static jint getTextWidths___CIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray text, 669 jint index, jint count, jint bidiFlags, jfloatArray widths) { 670 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 671 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 672 const jchar* textArray = env->GetCharArrayElements(text, NULL); 673 count = dotextwidths(env, paint, typeface, textArray + index, count, widths, bidiFlags); 674 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 675 JNI_ABORT); 676 return count; 677 } 678 679 static jint getTextWidths__StringIII_F(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring text, 680 jint start, jint end, jint bidiFlags, jfloatArray widths) { 681 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 682 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 683 const jchar* textArray = env->GetStringChars(text, NULL); 684 int count = dotextwidths(env, paint, typeface, textArray + start, end - start, widths, bidiFlags); 685 env->ReleaseStringChars(text, textArray); 686 return count; 687 } 688 689 static jfloat doTextRunAdvances(JNIEnv *env, Paint *paint, TypefaceImpl* typeface, const jchar *text, 690 jint start, jint count, jint contextCount, jboolean isRtl, 691 jfloatArray advances, jint advancesIndex) { 692 NPE_CHECK_RETURN_ZERO(env, paint); 693 NPE_CHECK_RETURN_ZERO(env, text); 694 695 if ((start | count | contextCount | advancesIndex) < 0 || contextCount < count) { 696 doThrowAIOOBE(env); 697 return 0; 698 } 699 if (count == 0) { 700 return 0; 701 } 702 if (advances) { 703 size_t advancesLength = env->GetArrayLength(advances); 704 if ((size_t)count > advancesLength) { 705 doThrowAIOOBE(env); 706 return 0; 707 } 708 } 709 jfloat* advancesArray = new jfloat[count]; 710 jfloat totalAdvance = 0; 711 712 int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR; 713 714 Layout layout; 715 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, start, count, contextCount); 716 layout.getAdvances(advancesArray); 717 totalAdvance = layout.getAdvance(); 718 719 if (advances != NULL) { 720 env->SetFloatArrayRegion(advances, advancesIndex, count, advancesArray); 721 } 722 delete [] advancesArray; 723 return totalAdvance; 724 } 725 726 static jfloat getTextRunAdvances___CIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle, 727 jlong typefaceHandle, 728 jcharArray text, jint index, jint count, jint contextIndex, jint contextCount, 729 jboolean isRtl, jfloatArray advances, jint advancesIndex) { 730 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 731 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 732 jchar* textArray = env->GetCharArrayElements(text, NULL); 733 jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextIndex, 734 index - contextIndex, count, contextCount, isRtl, advances, advancesIndex); 735 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 736 return result; 737 } 738 739 static jfloat getTextRunAdvances__StringIIIIZ_FI(JNIEnv* env, jobject clazz, jlong paintHandle, 740 jlong typefaceHandle, 741 jstring text, jint start, jint end, jint contextStart, jint contextEnd, jboolean isRtl, 742 jfloatArray advances, jint advancesIndex) { 743 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 744 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 745 const jchar* textArray = env->GetStringChars(text, NULL); 746 jfloat result = doTextRunAdvances(env, paint, typeface, textArray + contextStart, 747 start - contextStart, end - start, contextEnd - contextStart, isRtl, 748 advances, advancesIndex); 749 env->ReleaseStringChars(text, textArray); 750 return result; 751 } 752 753 static jint doTextRunCursor(JNIEnv *env, Paint* paint, const jchar *text, jint start, 754 jint count, jint flags, jint offset, jint opt) { 755 GraphemeBreak::MoveOpt moveOpt = GraphemeBreak::MoveOpt(opt); 756 size_t result = GraphemeBreak::getTextRunCursor(text, start, count, offset, moveOpt); 757 return static_cast<jint>(result); 758 } 759 760 static jint getTextRunCursor___C(JNIEnv* env, jobject clazz, jlong paintHandle, jcharArray text, 761 jint contextStart, jint contextCount, jint dir, jint offset, jint cursorOpt) { 762 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 763 jchar* textArray = env->GetCharArrayElements(text, NULL); 764 jint result = doTextRunCursor(env, paint, textArray, contextStart, contextCount, dir, 765 offset, cursorOpt); 766 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 767 return result; 768 } 769 770 static jint getTextRunCursor__String(JNIEnv* env, jobject clazz, jlong paintHandle, jstring text, 771 jint contextStart, jint contextEnd, jint dir, jint offset, jint cursorOpt) { 772 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 773 const jchar* textArray = env->GetStringChars(text, NULL); 774 jint result = doTextRunCursor(env, paint, textArray, contextStart, 775 contextEnd - contextStart, dir, offset, cursorOpt); 776 env->ReleaseStringChars(text, textArray); 777 return result; 778 } 779 780 class GetTextFunctor { 781 public: 782 GetTextFunctor(const Layout& layout, SkPath* path, jfloat x, jfloat y, Paint* paint, 783 uint16_t* glyphs, SkPoint* pos) 784 : layout(layout), path(path), x(x), y(y), paint(paint), glyphs(glyphs), pos(pos) { 785 } 786 787 void operator()(size_t start, size_t end) { 788 for (size_t i = start; i < end; i++) { 789 glyphs[i] = layout.getGlyphId(i); 790 pos[i].fX = x + layout.getX(i); 791 pos[i].fY = y + layout.getY(i); 792 } 793 if (start == 0) { 794 paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, path); 795 } else { 796 paint->getPosTextPath(glyphs + start, (end - start) << 1, pos + start, &tmpPath); 797 path->addPath(tmpPath); 798 } 799 } 800 private: 801 const Layout& layout; 802 SkPath* path; 803 jfloat x; 804 jfloat y; 805 Paint* paint; 806 uint16_t* glyphs; 807 SkPoint* pos; 808 SkPath tmpPath; 809 }; 810 811 static void getTextPath(JNIEnv* env, Paint* paint, TypefaceImpl* typeface, const jchar* text, 812 jint count, jint bidiFlags, jfloat x, jfloat y, SkPath* path) { 813 Layout layout; 814 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, text, 0, count, count); 815 size_t nGlyphs = layout.nGlyphs(); 816 uint16_t* glyphs = new uint16_t[nGlyphs]; 817 SkPoint* pos = new SkPoint[nGlyphs]; 818 819 x += MinikinUtils::xOffsetForTextAlign(paint, layout); 820 Paint::Align align = paint->getTextAlign(); 821 paint->setTextAlign(Paint::kLeft_Align); 822 paint->setTextEncoding(Paint::kGlyphID_TextEncoding); 823 GetTextFunctor f(layout, path, x, y, paint, glyphs, pos); 824 MinikinUtils::forFontRun(layout, paint, f); 825 paint->setTextAlign(align); 826 delete[] glyphs; 827 delete[] pos; 828 } 829 830 static void getTextPath___C(JNIEnv* env, jobject clazz, jlong paintHandle, 831 jlong typefaceHandle, jint bidiFlags, 832 jcharArray text, jint index, jint count, jfloat x, jfloat y, jlong pathHandle) { 833 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 834 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 835 SkPath* path = reinterpret_cast<SkPath*>(pathHandle); 836 const jchar* textArray = env->GetCharArrayElements(text, NULL); 837 getTextPath(env, paint, typeface, textArray + index, count, bidiFlags, x, y, path); 838 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), JNI_ABORT); 839 } 840 841 static void getTextPath__String(JNIEnv* env, jobject clazz, jlong paintHandle, 842 jlong typefaceHandle, jint bidiFlags, 843 jstring text, jint start, jint end, jfloat x, jfloat y, jlong pathHandle) { 844 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 845 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 846 SkPath* path = reinterpret_cast<SkPath*>(pathHandle); 847 const jchar* textArray = env->GetStringChars(text, NULL); 848 getTextPath(env, paint, typeface, textArray + start, end - start, bidiFlags, x, y, path); 849 env->ReleaseStringChars(text, textArray); 850 } 851 852 static void setShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle, jfloat radius, 853 jfloat dx, jfloat dy, jint color) { 854 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 855 if (radius <= 0) { 856 paint->setLooper(NULL); 857 } 858 else { 859 SkScalar sigma = android::uirenderer::Blur::convertRadiusToSigma(radius); 860 paint->setLooper(SkBlurDrawLooper::Create((SkColor)color, sigma, dx, dy))->unref(); 861 } 862 } 863 864 static jboolean hasShadowLayer(JNIEnv* env, jobject clazz, jlong paintHandle) { 865 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 866 return paint->getLooper() && paint->getLooper()->asABlurShadow(NULL); 867 } 868 869 static int breakText(JNIEnv* env, const Paint& paint, TypefaceImpl* typeface, const jchar text[], 870 int count, float maxWidth, jint bidiFlags, jfloatArray jmeasured, 871 const bool forwardScan) { 872 size_t measuredCount = 0; 873 float measured = 0; 874 875 Layout layout; 876 MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count); 877 float* advances = new float[count]; 878 layout.getAdvances(advances); 879 880 for (int i = 0; i < count; i++) { 881 // traverse in the given direction 882 int index = forwardScan ? i : (count - i - 1); 883 float width = advances[index]; 884 if (measured + width > maxWidth) { 885 break; 886 } 887 // properly handle clusters when scanning backwards 888 if (forwardScan || width != 0.0f) { 889 measuredCount = i + 1; 890 } 891 measured += width; 892 } 893 delete[] advances; 894 895 if (jmeasured && env->GetArrayLength(jmeasured) > 0) { 896 AutoJavaFloatArray autoMeasured(env, jmeasured, 1); 897 jfloat* array = autoMeasured.ptr(); 898 array[0] = measured; 899 } 900 return measuredCount; 901 } 902 903 static jint breakTextC(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jcharArray jtext, 904 jint index, jint count, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 905 NPE_CHECK_RETURN_ZERO(env, jtext); 906 907 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 908 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 909 910 bool forwardTextDirection; 911 if (count < 0) { 912 forwardTextDirection = false; 913 count = -count; 914 } 915 else { 916 forwardTextDirection = true; 917 } 918 919 if ((index < 0) || (index + count > env->GetArrayLength(jtext))) { 920 doThrowAIOOBE(env); 921 return 0; 922 } 923 924 const jchar* text = env->GetCharArrayElements(jtext, NULL); 925 count = breakText(env, *paint, typeface, text + index, count, maxWidth, 926 bidiFlags, jmeasuredWidth, forwardTextDirection); 927 env->ReleaseCharArrayElements(jtext, const_cast<jchar*>(text), 928 JNI_ABORT); 929 return count; 930 } 931 932 static jint breakTextS(JNIEnv* env, jobject clazz, jlong paintHandle, jlong typefaceHandle, jstring jtext, 933 jboolean forwards, jfloat maxWidth, jint bidiFlags, jfloatArray jmeasuredWidth) { 934 NPE_CHECK_RETURN_ZERO(env, jtext); 935 936 Paint* paint = reinterpret_cast<Paint*>(paintHandle); 937 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 938 939 int count = env->GetStringLength(jtext); 940 const jchar* text = env->GetStringChars(jtext, NULL); 941 count = breakText(env, *paint, typeface, text, count, maxWidth, bidiFlags, jmeasuredWidth, forwards); 942 env->ReleaseStringChars(jtext, text); 943 return count; 944 } 945 946 static void doTextBounds(JNIEnv* env, const jchar* text, int count, jobject bounds, 947 const Paint& paint, TypefaceImpl* typeface, jint bidiFlags) { 948 SkRect r; 949 SkIRect ir; 950 951 Layout layout; 952 MinikinUtils::doLayout(&layout, &paint, bidiFlags, typeface, text, 0, count, count); 953 MinikinRect rect; 954 layout.getBounds(&rect); 955 r.fLeft = rect.mLeft; 956 r.fTop = rect.mTop; 957 r.fRight = rect.mRight; 958 r.fBottom = rect.mBottom; 959 r.roundOut(&ir); 960 GraphicsJNI::irect_to_jrect(ir, env, bounds); 961 } 962 963 static void getStringBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle, 964 jstring text, jint start, jint end, jint bidiFlags, jobject bounds) { 965 const Paint* paint = reinterpret_cast<Paint*>(paintHandle);; 966 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 967 const jchar* textArray = env->GetStringChars(text, NULL); 968 doTextBounds(env, textArray + start, end - start, bounds, *paint, typeface, bidiFlags); 969 env->ReleaseStringChars(text, textArray); 970 } 971 972 static void getCharArrayBounds(JNIEnv* env, jobject, jlong paintHandle, jlong typefaceHandle, 973 jcharArray text, jint index, jint count, jint bidiFlags, jobject bounds) { 974 const Paint* paint = reinterpret_cast<Paint*>(paintHandle); 975 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 976 const jchar* textArray = env->GetCharArrayElements(text, NULL); 977 doTextBounds(env, textArray + index, count, bounds, *paint, typeface, bidiFlags); 978 env->ReleaseCharArrayElements(text, const_cast<jchar*>(textArray), 979 JNI_ABORT); 980 } 981 982 static jboolean layoutContainsNotdef(const Layout& layout) { 983 for (size_t i = 0; i < layout.nGlyphs(); i++) { 984 if (layout.getGlyphId(i) == 0) { 985 return true; 986 } 987 } 988 return false; 989 } 990 991 static jboolean hasGlyphVariation(const Paint* paint, TypefaceImpl* typeface, jint bidiFlags, 992 const jchar* chars, size_t size) { 993 // TODO: query font for whether character has variation selector; requires a corresponding 994 // function in Minikin. 995 return false; 996 } 997 998 static jboolean hasGlyph(JNIEnv *env, jclass, jlong paintHandle, jlong typefaceHandle, 999 jint bidiFlags, jstring string) { 1000 const Paint* paint = reinterpret_cast<Paint*>(paintHandle); 1001 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 1002 ScopedStringChars str(env, string); 1003 1004 /* start by rejecting variation selectors (not supported yet) */ 1005 size_t nChars = 0; 1006 for (size_t i = 0; i < str.size(); i++) { 1007 jchar c = str[i]; 1008 if (0xDC00 <= c && c <= 0xDFFF) { 1009 // invalid UTF-16, unpaired trailing surrogate 1010 return false; 1011 } else if (0xD800 <= c && c <= 0xDBFF) { 1012 if (i + 1 == str.size()) { 1013 // invalid UTF-16, unpaired leading surrogate at end of string 1014 return false; 1015 } 1016 i++; 1017 jchar c2 = str[i]; 1018 if (!(0xDC00 <= c2 && c2 <= 0xDFFF)) { 1019 // invalid UTF-16, unpaired leading surrogate 1020 return false; 1021 } 1022 // UTF-16 encoding of range U+E0100..U+E01EF is DB40 DD00 .. DB40 DDEF 1023 if (c == 0xDB40 && 0xDD00 <= c2 && c2 <= 0xDDEF) { 1024 return hasGlyphVariation(paint, typeface, bidiFlags, str.get(), str.size()); 1025 } 1026 } else if (0xFE00 <= c && c <= 0xFE0F) { 1027 return hasGlyphVariation(paint, typeface, bidiFlags, str.get(), str.size()); 1028 } 1029 nChars++; 1030 } 1031 Layout layout; 1032 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, str.get(), 0, str.size(), 1033 str.size()); 1034 size_t nGlyphs = layout.nGlyphs(); 1035 if (nGlyphs != 1 && nChars > 1) { 1036 // multiple-character input, and was not a ligature 1037 // TODO: handle ZWJ/ZWNJ characters specially so we can detect certain ligatures 1038 // in joining scripts, such as Arabic and Mongolian. 1039 return false; 1040 } 1041 return nGlyphs > 0 && !layoutContainsNotdef(layout); 1042 } 1043 1044 static jfloat doRunAdvance(const Paint* paint, TypefaceImpl* typeface, const jchar buf[], 1045 jint start, jint count, jint bufSize, jboolean isRtl, jint offset) { 1046 Layout layout; 1047 int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR; 1048 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, buf, start, count, bufSize); 1049 return getRunAdvance(layout, buf, start, count, offset); 1050 } 1051 1052 static jfloat getRunAdvance___CIIIIZI_F(JNIEnv *env, jclass, jlong paintHandle, 1053 jlong typefaceHandle, jcharArray text, jint start, jint end, jint contextStart, 1054 jint contextEnd, jboolean isRtl, jint offset) { 1055 const Paint* paint = reinterpret_cast<Paint*>(paintHandle); 1056 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 1057 // TODO performance: optimize JNI array access 1058 jchar* textArray = env->GetCharArrayElements(text, NULL); 1059 jfloat result = doRunAdvance(paint, typeface, textArray + contextStart, 1060 start - contextStart, end - start, contextEnd - contextStart, isRtl, 1061 offset - contextStart); 1062 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 1063 return result; 1064 } 1065 1066 static jint doOffsetForAdvance(const Paint* paint, TypefaceImpl* typeface, const jchar buf[], 1067 jint start, jint count, jint bufSize, jboolean isRtl, jfloat advance) { 1068 Layout layout; 1069 int bidiFlags = isRtl ? kBidi_Force_RTL : kBidi_Force_LTR; 1070 MinikinUtils::doLayout(&layout, paint, bidiFlags, typeface, buf, start, count, bufSize); 1071 return getOffsetForAdvance(layout, buf, start, count, advance); 1072 } 1073 static jint getOffsetForAdvance___CIIIIZF_I(JNIEnv *env, jclass, jlong paintHandle, 1074 jlong typefaceHandle, jcharArray text, jint start, jint end, jint contextStart, 1075 jint contextEnd, jboolean isRtl, jfloat advance) { 1076 const Paint* paint = reinterpret_cast<Paint*>(paintHandle); 1077 TypefaceImpl* typeface = reinterpret_cast<TypefaceImpl*>(typefaceHandle); 1078 // TODO performance: optimize JNI array access 1079 jchar* textArray = env->GetCharArrayElements(text, NULL); 1080 jint result = doOffsetForAdvance(paint, typeface, textArray + contextStart, 1081 start - contextStart, end - start, contextEnd - contextStart, isRtl, advance); 1082 result += contextStart; 1083 env->ReleaseCharArrayElements(text, textArray, JNI_ABORT); 1084 return result; 1085 } 1086 1087}; 1088 1089static JNINativeMethod methods[] = { 1090 {"finalizer", "(J)V", (void*) PaintGlue::finalizer}, 1091 {"native_init","()J", (void*) PaintGlue::init}, 1092 {"native_initWithPaint","(J)J", (void*) PaintGlue::initWithPaint}, 1093 1094 {"native_reset","!(J)V", (void*) PaintGlue::reset}, 1095 {"native_set","!(JJ)V", (void*) PaintGlue::assign}, 1096 {"getFlags","!()I", (void*) PaintGlue::getFlags}, 1097 {"setFlags","!(I)V", (void*) PaintGlue::setFlags}, 1098 {"getHinting","!()I", (void*) PaintGlue::getHinting}, 1099 {"setHinting","!(I)V", (void*) PaintGlue::setHinting}, 1100 {"setAntiAlias","!(Z)V", (void*) PaintGlue::setAntiAlias}, 1101 {"setSubpixelText","!(Z)V", (void*) PaintGlue::setSubpixelText}, 1102 {"setLinearText","!(Z)V", (void*) PaintGlue::setLinearText}, 1103 {"setUnderlineText","!(Z)V", (void*) PaintGlue::setUnderlineText}, 1104 {"setStrikeThruText","!(Z)V", (void*) PaintGlue::setStrikeThruText}, 1105 {"setFakeBoldText","!(Z)V", (void*) PaintGlue::setFakeBoldText}, 1106 {"setFilterBitmap","!(Z)V", (void*) PaintGlue::setFilterBitmap}, 1107 {"setDither","!(Z)V", (void*) PaintGlue::setDither}, 1108 {"native_getStyle","!(J)I", (void*) PaintGlue::getStyle}, 1109 {"native_setStyle","!(JI)V", (void*) PaintGlue::setStyle}, 1110 {"getColor","!()I", (void*) PaintGlue::getColor}, 1111 {"setColor","!(I)V", (void*) PaintGlue::setColor}, 1112 {"getAlpha","!()I", (void*) PaintGlue::getAlpha}, 1113 {"setAlpha","!(I)V", (void*) PaintGlue::setAlpha}, 1114 {"getStrokeWidth","!()F", (void*) PaintGlue::getStrokeWidth}, 1115 {"setStrokeWidth","!(F)V", (void*) PaintGlue::setStrokeWidth}, 1116 {"getStrokeMiter","!()F", (void*) PaintGlue::getStrokeMiter}, 1117 {"setStrokeMiter","!(F)V", (void*) PaintGlue::setStrokeMiter}, 1118 {"native_getStrokeCap","!(J)I", (void*) PaintGlue::getStrokeCap}, 1119 {"native_setStrokeCap","!(JI)V", (void*) PaintGlue::setStrokeCap}, 1120 {"native_getStrokeJoin","!(J)I", (void*) PaintGlue::getStrokeJoin}, 1121 {"native_setStrokeJoin","!(JI)V", (void*) PaintGlue::setStrokeJoin}, 1122 {"native_getFillPath","!(JJJ)Z", (void*) PaintGlue::getFillPath}, 1123 {"native_setShader","!(JJ)J", (void*) PaintGlue::setShader}, 1124 {"native_setColorFilter","!(JJ)J", (void*) PaintGlue::setColorFilter}, 1125 {"native_setXfermode","!(JJ)J", (void*) PaintGlue::setXfermode}, 1126 {"native_setPathEffect","!(JJ)J", (void*) PaintGlue::setPathEffect}, 1127 {"native_setMaskFilter","!(JJ)J", (void*) PaintGlue::setMaskFilter}, 1128 {"native_setTypeface","!(JJ)J", (void*) PaintGlue::setTypeface}, 1129 {"native_setRasterizer","!(JJ)J", (void*) PaintGlue::setRasterizer}, 1130 {"native_getTextAlign","!(J)I", (void*) PaintGlue::getTextAlign}, 1131 {"native_setTextAlign","!(JI)V", (void*) PaintGlue::setTextAlign}, 1132 {"native_setTextLocale","!(JLjava/lang/String;)V", (void*) PaintGlue::setTextLocale}, 1133 {"isElegantTextHeight","!()Z", (void*) PaintGlue::isElegantTextHeight}, 1134 {"setElegantTextHeight","!(Z)V", (void*) PaintGlue::setElegantTextHeight}, 1135 {"getTextSize","!()F", (void*) PaintGlue::getTextSize}, 1136 {"setTextSize","!(F)V", (void*) PaintGlue::setTextSize}, 1137 {"getTextScaleX","!()F", (void*) PaintGlue::getTextScaleX}, 1138 {"setTextScaleX","!(F)V", (void*) PaintGlue::setTextScaleX}, 1139 {"getTextSkewX","!()F", (void*) PaintGlue::getTextSkewX}, 1140 {"setTextSkewX","!(F)V", (void*) PaintGlue::setTextSkewX}, 1141 {"native_getLetterSpacing","!(J)F", (void*) PaintGlue::getLetterSpacing}, 1142 {"native_setLetterSpacing","!(JF)V", (void*) PaintGlue::setLetterSpacing}, 1143 {"native_setFontFeatureSettings","(JLjava/lang/String;)V", 1144 (void*) PaintGlue::setFontFeatureSettings}, 1145 {"native_getHyphenEdit", "!(J)I", (void*) PaintGlue::getHyphenEdit}, 1146 {"native_setHyphenEdit", "!(JI)V", (void*) PaintGlue::setHyphenEdit}, 1147 {"ascent","!()F", (void*) PaintGlue::ascent}, 1148 {"descent","!()F", (void*) PaintGlue::descent}, 1149 1150 {"getFontMetrics", "(Landroid/graphics/Paint$FontMetrics;)F", 1151 (void*)PaintGlue::getFontMetrics}, 1152 {"getFontMetricsInt", "(Landroid/graphics/Paint$FontMetricsInt;)I", 1153 (void*)PaintGlue::getFontMetricsInt}, 1154 {"native_measureText","([CIII)F", (void*) PaintGlue::measureText_CIII}, 1155 {"native_measureText","(Ljava/lang/String;I)F", (void*) PaintGlue::measureText_StringI}, 1156 {"native_measureText","(Ljava/lang/String;III)F", (void*) PaintGlue::measureText_StringIII}, 1157 {"native_breakText","(JJ[CIIFI[F)I", (void*) PaintGlue::breakTextC}, 1158 {"native_breakText","(JJLjava/lang/String;ZFI[F)I", (void*) PaintGlue::breakTextS}, 1159 {"native_getTextWidths","(JJ[CIII[F)I", (void*) PaintGlue::getTextWidths___CIII_F}, 1160 {"native_getTextWidths","(JJLjava/lang/String;III[F)I", 1161 (void*) PaintGlue::getTextWidths__StringIII_F}, 1162 {"native_getTextRunAdvances","(JJ[CIIIIZ[FI)F", 1163 (void*) PaintGlue::getTextRunAdvances___CIIIIZ_FI}, 1164 {"native_getTextRunAdvances","(JJLjava/lang/String;IIIIZ[FI)F", 1165 (void*) PaintGlue::getTextRunAdvances__StringIIIIZ_FI}, 1166 1167 {"native_getTextRunCursor", "(J[CIIIII)I", (void*) PaintGlue::getTextRunCursor___C}, 1168 {"native_getTextRunCursor", "(JLjava/lang/String;IIIII)I", 1169 (void*) PaintGlue::getTextRunCursor__String}, 1170 {"native_getTextPath", "(JJI[CIIFFJ)V", (void*) PaintGlue::getTextPath___C}, 1171 {"native_getTextPath", "(JJILjava/lang/String;IIFFJ)V", (void*) PaintGlue::getTextPath__String}, 1172 {"nativeGetStringBounds", "(JJLjava/lang/String;IIILandroid/graphics/Rect;)V", 1173 (void*) PaintGlue::getStringBounds }, 1174 {"nativeGetCharArrayBounds", "(JJ[CIIILandroid/graphics/Rect;)V", 1175 (void*) PaintGlue::getCharArrayBounds }, 1176 {"native_hasGlyph", "(JJILjava/lang/String;)Z", (void*) PaintGlue::hasGlyph }, 1177 {"native_getRunAdvance", "(JJ[CIIIIZI)F", (void*) PaintGlue::getRunAdvance___CIIIIZI_F}, 1178 {"native_getOffsetForAdvance", "(JJ[CIIIIZF)I", 1179 (void*) PaintGlue::getOffsetForAdvance___CIIIIZF_I}, 1180 1181 {"native_setShadowLayer", "!(JFFFI)V", (void*)PaintGlue::setShadowLayer}, 1182 {"native_hasShadowLayer", "!(J)Z", (void*)PaintGlue::hasShadowLayer} 1183}; 1184 1185int register_android_graphics_Paint(JNIEnv* env) { 1186 gFontMetrics_class = FindClassOrDie(env, "android/graphics/Paint$FontMetrics"); 1187 gFontMetrics_class = MakeGlobalRefOrDie(env, gFontMetrics_class); 1188 1189 gFontMetrics_fieldID.top = GetFieldIDOrDie(env, gFontMetrics_class, "top", "F"); 1190 gFontMetrics_fieldID.ascent = GetFieldIDOrDie(env, gFontMetrics_class, "ascent", "F"); 1191 gFontMetrics_fieldID.descent = GetFieldIDOrDie(env, gFontMetrics_class, "descent", "F"); 1192 gFontMetrics_fieldID.bottom = GetFieldIDOrDie(env, gFontMetrics_class, "bottom", "F"); 1193 gFontMetrics_fieldID.leading = GetFieldIDOrDie(env, gFontMetrics_class, "leading", "F"); 1194 1195 gFontMetricsInt_class = FindClassOrDie(env, "android/graphics/Paint$FontMetricsInt"); 1196 gFontMetricsInt_class = MakeGlobalRefOrDie(env, gFontMetricsInt_class); 1197 1198 gFontMetricsInt_fieldID.top = GetFieldIDOrDie(env, gFontMetricsInt_class, "top", "I"); 1199 gFontMetricsInt_fieldID.ascent = GetFieldIDOrDie(env, gFontMetricsInt_class, "ascent", "I"); 1200 gFontMetricsInt_fieldID.descent = GetFieldIDOrDie(env, gFontMetricsInt_class, "descent", "I"); 1201 gFontMetricsInt_fieldID.bottom = GetFieldIDOrDie(env, gFontMetricsInt_class, "bottom", "I"); 1202 gFontMetricsInt_fieldID.leading = GetFieldIDOrDie(env, gFontMetricsInt_class, "leading", "I"); 1203 1204 gPaint_class = MakeGlobalRefOrDie(env, FindClassOrDie(env, "android/graphics/Paint")); 1205 gPaint_nativeInstanceID = GetFieldIDOrDie(env, gPaint_class, "mNativePaint", "J"); 1206 gPaint_nativeTypefaceID = GetFieldIDOrDie(env, gPaint_class, "mNativeTypeface", "J"); 1207 1208 return RegisterMethodsOrDie(env, "android/graphics/Paint", methods, NELEM(methods)); 1209} 1210 1211} 1212